Monkey see, monkey do... two RL-P18s for me too! - Page 7 - Home Theater Forum and Systems - HomeTheaterShack.com

Reply
 
Thread Tools
post #61 of 151 Old 10-14-07, 08:39 PM Thread Starter
Senior Shackster
Bradley
 
Join Date: Aug 2007
Location: Seattleland
Posts: 146
Re: Monkey see, monkey do... two RL-P18s for me too!

Quote:
brucek wrote: View Post
If you read a few pages of starting from here...
OK, I see it now. I apologize for being in a hurry and not looking more carefully at all 8 pages of that PDF document. Apparently I had a major brain fart. It certainly does couple the driver to the box via the magnet brace.

Interesting concept. I don't think that it would be trivial to implement, though, because you'd have to be pretty much "spot on" (as the British say) with the dimensions to ensure a snug fit into the magnet.

Progress report: all 24 panels (to make both boxes) have been cut! Time to fire up the router.

Bradley

P.S. If this box design turns out to be a flop, I can always order up some 24" or 30" sonotube.

Last edited by Bradley; 10-15-07 at 12:07 AM. Reason: "Engrish" removed.
Bradley is offline  
Sponsored Links
Advertisement
 
post #62 of 151 Old 10-14-07, 09:20 PM
Senior Shackster
Will
 
Join Date: Sep 2006
Location: Matthews, NC
Posts: 521
Send a message via AIM to WillyD Send a message via Skype™ to WillyD
Re: Monkey see, monkey do... two RL-P18s for me too!

Quote:
The vent on the back of the driver should ideally have clearance equal to its diameter as well
Do you know the diameter of the pole vent on the Rl-p? I can't find that spec anywhere. I know TC just recommended a min of .8" clearance for the TC-2000.
WillyD is offline  
post #63 of 151 Old 10-14-07, 09:21 PM
Senior Shackster
Will
 
Join Date: Sep 2006
Location: Matthews, NC
Posts: 521
Send a message via AIM to WillyD Send a message via Skype™ to WillyD
Re: Monkey see, monkey do... two RL-P18s for me too!

Quote:
P.S. If this box design turns out to be a flop, I can alway order up some 24" or 30" sonotube.
Boy, that would be a lot easier.
WillyD is offline  
 
post #64 of 151 Old 10-14-07, 10:24 PM Thread Starter
Senior Shackster
Bradley
 
Join Date: Aug 2007
Location: Seattleland
Posts: 146
Re: Monkey see, monkey do... two RL-P18s for me too!

Quote:
WillyD wrote: View Post
Do you know the diameter of the pole vent on the Rl-p? I can't find that spec anywhere. I know TC just recommended a min of .8" clearance for the TC-2000.
The magnet vent hole is flared so that makes it harder to measure. Earlier today I just grabbed a tape measure to get a quick approximate measurement. Seemed like about an inch and a half. But I will see if I can get my caliper in there and produce a more accurate number.

Edit: it's no more than 1.375 inches. I stuck the jaws of the dial caliper in as far as I could while keeping it square with the back of the driver and the hole. I think I got close to the "bottom" of the flare, so that number probably isn't too far off.

Last edited by Bradley; 10-14-07 at 10:34 PM.
Bradley is offline  
post #65 of 151 Old 10-15-07, 12:30 AM Thread Starter
Senior Shackster
Bradley
 
Join Date: Aug 2007
Location: Seattleland
Posts: 146
Re: Monkey see, monkey do... two RL-P18s for me too!

Quote:
Bradley wrote: View Post
I guess I will just compromise and move the tube back half an inch. It's not the end of the world if the port outlet is 7.5" from the rear wall instead of 8. It has ample clearance in all other directions: 11.5" to side wall, 8" to top and bottom walls, 10.625 to front wall. Also, the MDF brace doesn't look like a "wall" to the magnet vent. Moving half an inch away will put it 1 3/8" from the vent hole instead of the ideal 1 1/2 inches. That isn't too bad considering a) the brace is only 3/4" thick and will have rounded edges, and b) the port tube outer wall (a much more significant "obstacle") will sit 2 5/8 inches from the rear of the magnet.
Update:

Since the magnet vent hole seems to be 1 3/8" diameter, the center brace is now exactly one diameter from the vent hole.

Measuring precisely from the edge of the main port opening (and not even thinking about the port wall thickness) to the rear wall is 7 9/16". The port I.D. is right around 8 3/8". So the discrepency in port placement is 8.2%. I don't think I'm going to lose sleep over that.

(note: this picture diagram doesn't take into account port wall thickness of approx 1/8")

Bradley is offline  
post #66 of 151 Old 10-15-07, 04:59 PM
Elite Shackster
 
Blaser's Avatar
Ahmed
 
Join Date: Aug 2006
Location: Cairo-Egypt
Posts: 1,940
Send a message via MSN to Blaser
Re: Monkey see, monkey do... two RL-P18s for me too!

I don't think that running a clipped signal of 500-600 W will/can do any harm to the RL-P18, It will sound very vey bad though!... And I would never be afraid of bottoming out an RL-P18 (80 mm P-P) with such power even tuned at 16 Hz....(I'm using 2KW amp/driver...) Trust me

ASME AI
Yamaha RX-V2500, Wharfedale Diamond 9.6 Fronts, Wharfedale Diamond CM Center, Diamond DFS Surround and rear, Behringer FBQ 2496, Dual RL-P18s 625L LLTs, Dual TA-2400 Pro (2 * 2000 W Amp), Samsung HD870 DVD player, Carada BW 16:9 106" screen, Epson TW-2000, 60 Gb PS3
Important HT proverbs:
- "You can never have too much headroom" (talking about bass)
- "you can never have too big a screen" (talking about still pictures)


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Blaser is offline  
post #67 of 151 Old 10-15-07, 08:05 PM
Elite Shackster
 
SteveCallas's Avatar
Steve
 
Join Date: Apr 2006
Posts: 2,398
Re: Monkey see, monkey do... two RL-P18s for me too!

Quote:
Bradley wrote:
Since the magnet vent hole seems to be 1 3/8" diameter, the center brace is now exactly one diameter from the vent hole.

Measuring precisely from the edge of the main port opening (and not even thinking about the port wall thickness) to the rear wall is 7 9/16". The port I.D. is right around 8 3/8".
I salute your effort to get it done right


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
SteveCallas is offline  
post #68 of 151 Old 10-15-07, 08:47 PM Thread Starter
Senior Shackster
Bradley
 
Join Date: Aug 2007
Location: Seattleland
Posts: 146
Re: Monkey see, monkey do... two RL-P18s for me too!

Well, it's no sonotube... but I tried!
Bradley is offline  
post #69 of 151 Old 10-16-07, 04:32 PM Thread Starter
Senior Shackster
Bradley
 
Join Date: Aug 2007
Location: Seattleland
Posts: 146
Re: Monkey see, monkey do... two RL-P18s for me too!

Cut my first circle last night!



What a mess...



If I don't die from MDF dust poisoning, these subs are gonna rock.

Bradley is offline  
post #70 of 151 Old 10-16-07, 04:37 PM
Senior Shackster
Scott
 
Join Date: Apr 2007
Location: Clovis, CA
Posts: 127
Re: Monkey see, monkey do... two RL-P18s for me too!

Ah, that dust should read: "Bradley was here." or "Big bass ahead."



To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Scott S is offline  
Reply

Bookmarks

Tags
monkey , rlp18s

Quick Reply
Message:
Options

Register Now




PLEASE COMPLETE ALL REQUIRED FIELDS BELOW... THANKS!

REQUIRED FIELDS ON THIS PAGE
YOU MUST COMPLETE ALL OF THESE

Username
Password
Confirm Password
Email Address
Confirm Email Address
Random Question
Random Question #2




User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
PLEASE READ BELOW PRIOR TO ENTERING AN EMAIL ADDRESS!

ATTENTION!

YOU MUST ACTIVATE YOUR ACCOUNT!

Activation requires you reply to an email we will send you after you register... if you do not reply to this email, you will not be able to view certain areas of the forum or certain images... nor will you be able download software.

AN INVALID EMAIL ADDRESS WILL CAUSE YOUR ACCOUNT TO BE DELETED!

See our banned email list here: Banned Email List

We DO NOT respond to spamcop, boxtrapper and spamblocker emails... please add @hometheatershack DOT com to your whitelist prior to registering or you will get nowhere on your registration.


Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML is not allowed!
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


For the best viewing experience please update your browser to Google Chrome